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An open source document database with bitemporal graph queries

There is a newer version: 2.0.0-beta4

package xtdb.util;

import java.util.LinkedHashMap;
import java.util.Map.Entry;
import java.util.function.BiPredicate;

public class LRU extends LinkedHashMap {
    private static final long serialVersionUID = -4055957566679424062L;

    private final BiPredicate, Entry> removeEldestEntryFn;

    public LRU(int size, BiPredicate, Entry> removeEldestEntryFn) {
        super(size, 0.75f, true);
        this.removeEldestEntryFn = removeEldestEntryFn;
    }

    public boolean removeEldestEntry(Entry entry) {
        return this.removeEldestEntryFn.test(this, entry);
    }
}